Rear bumper diffuser



FIG. 1 is a front perspective view of a rear bumper diffuser showing my new design.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a right elevational view thereof.

FIG. 5 is a left elevational view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in the figures are for the purpose of illustrating portions of the rear bumper diffuser that form no part of the claimed design. 

CLAIM The ornamental design for a rear bumper diffuser, as shown and described. 